| 摘要 |
A composition having, for an incident illumination of 45°, a variation Dh of hue angle h of at least 50°, and, for example, of at least 70°, when the angle of observation is varied from -10° to +30°, and a difference (Deltaa*<2>+Deltab*<2>)<1/2 >of at least 5 when the angle of observation is varied from -30° to -70°.
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